Hmbown/CodeWhale · error · std::io::Error

Session id cannot be empty

Error message

Session id cannot be empty

What it means

Guard in validated_session_id: the supplied session id was empty or whitespace after trimming. Session ids key the approval receipt store and transcript files; an empty id would collapse all sessions onto one storage slot, so replay/approval lookups fail fast with InvalidInput.

Source

Thrown at crates/tui/src/session_manager.rs:912

        let durable = self.approval_receipt_store().load(&session.metadata.id)?;
        if !durable.is_empty() {
            session.approval_receipts = durable;
        }
        ApprovalReplay::from_receipts(&session.approval_receipts)
            .map_err(|err| io::Error::new(io::ErrorKind::InvalidData, err))?;
        Ok(())
    }

    /// Reconstruct completed approvals and interrupted unmatched asks for one
    /// session without consulting the model transcript.
    pub(crate) fn replay_approvals(&self, session_id: &str) -> io::Result<ApprovalReplay> {
        self.approval_receipt_store().replay(session_id)
    }

    fn validated_session_id<'a>(&self, id: &'a str) -> std::io::Result<&'a str> {
        let trimmed = id.trim();
        if trimmed.is_empty() {
            return Err(std::io::Error::new(
                std::io::ErrorKind::InvalidInput,
                "Session id cannot be empty",
            ));
        }
        if !trimmed
            .chars()
            .all(|c| c.is_ascii_alphanumeric() || c == '-' || c == '_')
        {
            return Err(std::io::Error::new(
                std::io::ErrorKind::InvalidInput,
                format!("Invalid session id '{id}'"),
            ));
        }
        if trimmed == SESSION_BOOT_OWNERS_STEM {
            return Err(std::io::Error::new(
                std::io::ErrorKind::InvalidInput,
                format!("Session id '{trimmed}' collides with a reserved sessions file"),
            ));

View on GitHub (pinned to 0c42157ee5)

Solutions

1. Pass a real, previously created session id.
2. Check upstream session creation/resolution for failures that yield empty ids.

When it happens

Trigger: Thrown at crates/tui/src/session_manager.rs:912 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of Hmbown/CodeWhale@0c42157ee5 (2026-08-20). Data as JSON: /api/errors/ee80ee660427385e. Report an issue: GitHub.